change structure of newfeeds
Merge branch 'v2' of github.com:Neamar/corporate into logging

Prise en compte des votes
add newsfeed for invisible hand and change newsfeed for nationality. Add a __def__unicode__ function for the markets
add newsfeed for votes
using ManyToMany for corporations and players
Adjustments
corrections
corrections
Merge pull request #82 from Neamar/logging

Logging